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RESEARCH PAPERS

Spline Coupling Induced Nonsynchronous Rotor Vibrations

[+] Author and Article Information
R. A. Marmol

Pratt & Whitney Aircraft Group, West Palm Beach, Fla.

A. J. Smalley, J. A. Tecza

Mechanical Technology Inc. (MTI), Latham, N.Y.

J. Mech. Des 102(1), 168-176 (Jan 01, 1980) (9 pages) doi:10.1115/1.3254709 History: Received June 07, 1979; Online November 17, 2009

Abstract

A mathematical model for predicting spline coupling induced nonsynchronous rotor vibrations is developed, and the predictions are compared with data from a rotor dynamics test rig. The special feature of the spline model is the characterization of the friction forces that are produced at the mating spline teeth surfaces and subsequent calculation of the internal damping coefficients. The spline internal damping and the resulting rotor instabilities are predicted for four different spline configurations and the solution results are correlated with measured data from a gas turbine rotor simulator test rig.

Copyright © 1980 by ASME
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